When holes are drilled through the wall of a water tower, water will spurt out with the greatest speed from the hole closest to the _________

It is correct to say that impulse is equal to ____________  

If we triple the mass of an object without a change in volume, its density would be ________

Buoyant force is greatest on a submerged __________ (Note: Density of iron is higher than that of copper)

A flask brim filled with water is on a weighing scale. If you float a piece of wood in it, after spillage away from the scale, the scale reading will be ____________

Compared with an alcohol barometer, the column height for a mercury barometer would be __________

Degrees of freedom:

According to Newton, the closer gravitationally interacting objects are to each other, the _____________    

Use the dictionary below to answer Questions 12 and 13.

A freight car with mass (mA) of 5000-kg crashes into a freight car with mass (mB) of 10,000-kg at rest. They couple upon collision and move with a speed (vf) of 2 m/s. What was the initial speed  (vAi) of the 5000-kg freight car?